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WCF interview questions

WCF interview questions.

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  • 1.

    What is WCF?

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  • 2.

    What are WCF Service Endpoints?

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  • 3.

    What is a service contract in WCF?

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  • 4.

    Provide some scenarios when we could use WCF services

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  • 5.

    Could you name basic WCF service components?

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  • 6.

    What are the features and advantage of WCF?

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  • 7.

    Explain what is SOA?

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  • 8.

    Compare WCF vs ASP.NET Web API?

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  • 9.

    Is it True that ASP.NET Web API has Replaced WCF?

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  • 10.

    What is transport in WCF?

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  • 11.

    When DataContract and ServiceContract should be used in an application ?

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  • 12.

    What are the Possible Ways of Hosting a WCF Service?

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  • 13.

    Explain the difference between WCF vs ASP.NET Web API?

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  • 14.

    What is Message Contract in WCF?

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  • 15.

    Name some different types of contracts in WCF

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  • 16.

    What is an Operation Contract in WCF?

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  • 17.

    What is WCF Data Contract?

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  • 18.

    Why we need Streaming?

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  • 19.

    Explain WCF Message exchange Pattern

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  • 20.

    What is meant by WS-*?

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  • 21.

    What is WCF Binding and how many of them do you know?

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  • 22.

    What are the differences between WCF and ASMX Web Services?

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  • 23.

    Why we need Fault Contracts in WCF? Why not just use error codes?

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  • 24.

    When would we use binary encoder?

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  • 25.

    Can I use MessageContract instead of DataContract or in complement to DataContract?

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  • 26.

    Will it make any difference if I change the operation contract of methods having no return value by OperationContract (IsOneWay=true)?

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  • 27.

    When would you use Duplex WCF service?

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  • 28.

    What is interoperability and how is it achieved with WCF services?

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  • 29.

    Explain Message Encoding in WCF and when to use one?

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  • 30.

    What replaces WCF in .Net Core?

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  • 31.

    Could we use WSHttpBinding with Request-CallBack (also called Duplex) exchange pattern?

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  • 32.

    Explain Binary vs MTOM vs Streaming in WCF?

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  • 33.

    Should I use WCF or raw sockets?

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  • 34.

    What is the difference between hosting WCF service on IIS, Windows Service and self-hosted app?

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  • 35.

    What is the main difference between Request-Response and Duplex in WCF Message Exchange Pattern?

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